Add option to gate parsing of Flow records

Summary: Add option to gate parsing of Flow records

Reviewed By: avp

Differential Revision: D88059450

fbshipit-source-id: c468b3c6062f0b1e562274c36d5e0c5836d5f04b

Author: gkz

include/hermes/AST/Context.h

@@ -255,6 +255,10 @@ class Context {
   /// also using Flow syntax.
   bool parseFlowMatch_{false};
 
+  /// If true, allow parsing Flow record declarations and expressions
+  /// when also using Flow syntax.
+  bool parseFlowRecords_{false};
+
   /// Whether to parse Flow type syntax.
   ParseFlowSetting parseFlow_{ParseFlowSetting::NONE};
 
@@ -452,6 +456,13 @@ class Context {
     return parseFlowMatch_;
   }
 
+  void setParseFlowRecords(bool parseFlowRecords) {
+    parseFlowRecords_ = parseFlowRecords;
+  }
+  bool getParseFlowRecords() const {
+    return parseFlowRecords_;
+  }
+
   void setParseTS(bool parseTS) {
     parseTS_ = parseTS;
   }

lib/CompilerDriver/CompilerDriver.cpp

@@ -515,6 +515,13 @@ static opt<bool> ParseFlowMatch(
     init(false),
     Hidden,
     cat(CompilerCategory));
+
+static opt<bool> ParseFlowRecords(
+    "Xparse-flow-records",
+    desc("Parse Flow record declarations and expressions"),
+    init(false),
+    Hidden,
+    cat(CompilerCategory));
 #endif
 
 #if HERMES_PARSE_TS
@@ -1216,6 +1223,7 @@ std::shared_ptr<Context> createContext(
   }
   context->setParseFlowComponentSyntax(cl::ParseFlowComponentSyntax);
   context->setParseFlowMatch(cl::ParseFlowMatch);
+  context->setParseFlowRecords(cl::ParseFlowRecords);
 #endif
 
 #if HERMES_PARSE_TS